package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkSpaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j

public class ReportServiceImpl implements ReportService {


    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Resource
    private WorkSpaceService workSpaceService;

    /**
     * 统计指定时间区间的营业额数据
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin,end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while (!begin.isAfter(end)) {
            //计算指定日期后一天的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        dateList.add(end);
        List<Double> turnoverList = new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据，营业额是指：订单状态为已完成，且下单时间在指定日期范围内的订单总金额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //select sum(amount) from orders where status = 5 and order_time>=begin and order_time<=end
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sumByMap(map);
            turnoverList.add(turnover == null ? 0.0 : turnover);


        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 统计指定时间区间内用户数量
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin,end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.isAfter(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        dateList.add(end);

        //存放每天的新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //存放每天的总用户数量
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据，营业额是指：订单状态为已完成，且下单时间在指定日期范围内的订单总金额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MAX);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);

            //总用户数量
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin", beginTime);
            //新增用户数量
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);


        }


        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    /**
     * 统计指定时间区间内订单数量
     *
     * @param begin
     * @param end
     * @return
     */

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin,end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.isAfter(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        dateList.add(end);

        //存放每天的订单总数
        List<Integer> newtotalOrderCountList = new ArrayList<>();
        //存放每天的有效订单数量
        List<Integer> newvalidOrderCountList = new ArrayList<>();
//        //订单总数
//        List<Integer> totalOrderCountList = new ArrayList<>();
//        //有效订单数
//        List<Integer> validOrderCountList = new ArrayList<>();
        //订单完成率
//        orderCompletionRate

        for (LocalDate date : dateList) {
            //转换时间格式
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);

            map.put("begin", beginTime);

            //每天的订单总数
            Integer newtotalOrderCount = orderMapper.countByMap(map);
            map.put("status", Orders.COMPLETED);

            //每一天的有效订单数量
            Integer newvalidOrderCount = orderMapper.countByMap(map);

            newtotalOrderCountList.add(newtotalOrderCount);
            newvalidOrderCountList.add(newvalidOrderCount);
        }

//        Integer totalOrderCount = orderMapper.findAll();
//        Integer validOrderCount = orderMapper.countStatus(Orders.COMPLETED);
//        Double orderCompletionRate = (double) ((totalOrderCount / validOrderCount)) / 100;

        //计算时间区间内的订单总数量
        Integer totalOrderCount = newtotalOrderCountList.stream().reduce(Integer::sum).get();

        //计算时间区间内的有效订单数量
        Integer validOrderCount = newvalidOrderCountList.stream().reduce(Integer::sum).get();

        //计算订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue()/totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(newtotalOrderCountList, ","))
                .validOrderCountList(StringUtils.join(newvalidOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 统计指定时间区间内的销量排名top10
     * @param begin
     * @param end
     * @return
     */

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        List<Integer> number = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(number, ",");



        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate endBegin = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workSpaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(endBegin, LocalTime.MAX));
        //通过POI讲数据写入Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模版文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + endBegin);

            //获取第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2 ).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workSpaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //通过输出流将将Excel文件输出到浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
